OTOY Forums

Hi, can someone help me figure this out, because I don't get it. I have a scene modeled in Maya that has real size objects (a man is about 1.80 meter, a door is about 2 meters, etc.)
Octane is physically-based so I'm expecting everything to look correct, however the lights in my scene are too weak! Even with power set to 100000, they are still too weak. Obviously, if I scale the scene down, lets's say 10 times, the lights become much brighter, but I don't want to rescale, it should work with real size scale... A lot of people here are making interiors, so they must deal with real measurements, please tell me what I'm doing wrong.

There is a Scale option in the Preferences, but changing it doesn't do anything.

Help!

The length unit option in the preferences is a default setting for new mesh nodes. To change an existing mesh, go into the settings dialog for this mesh. Select the mesh, and click the settings button next to the file name.

To check the scale you can use the "scale" slider in the camera, it gives the with of the current view in meters if the camera is set to orthographic. For the standard perspective camera it shows the width of the view in the focus plane.

--
Roeland

All my interiors have a camera iso equal to 800...not less and exposure set to 1,2
in the reality many pro cameras have 16000 or 32000 iso
In my reflex I have no linear exposure amplifier except for EV, that slight tweaks the exposure.

the Octane camera should follow the modern cameras functions

Also the light should follow a standard rule: cd, lux, lumen, watt scale and not an empiric formula

there isn't a scientific approach in Octane, all lights and camera parameters don't follow the real world rules.
This is not an issue because we can tweak the light as we want and lighting is an emotional thing.

roeland wrote:The length unit option in the preferences is a default setting for new mesh nodes. To change an existing mesh, go into the settings dialog for this mesh. Select the mesh, and click the settings button next to the file name.

To check the scale you can use the "scale" slider in the camera, it gives the with of the current view in meters if the camera is set to orthographic. For the standard perspective camera it shows the width of the view in the focus plane.

--
Roeland

Thank you Roeland, but that option actually resizes the object. Isn't that wrong?
In this way yes, I can change the scale, but I have to reposition all the cameras...
What is the correct workflow? For example, my Maya unit is set to cm by default. Should I set Octane to cm as well?

Hi Rikk

If I read you correctly you're modeling in Maya with 1 unit = 1 meter.
The Maya's preferences (cm by default) should not be considered; they're not exported.
In Octane just set the import settings 'Scale (OBJ file unit)' to what 1 unit is in reality.
(in the plugin there's a 'Scale (1 unit = X meter)' parameter for this)

F

tchoa wrote:Hi Rikk

If I read you correctly you're modeling in Maya with 1 unit = 1 meter.
The Maya's preferences (cm by default) should not be considered; they're not exported.
In Octane just set the import settings 'Scale (OBJ file unit)' to what 1 unit is in reality.
(in the plugin there's a 'Scale (1 unit = X meter)' parameter for this)

F

Well, did what Roeland suggested, I checked the size using the Orthographic camera and it turned out the scene was HUGE.
So I changed the Octane import scale to cm, re-imported the same scene and now the size is correct.

From now on I have to keep it in cm if I want real size from Maya.
Cheers!